"Daddy, Momma taught me about the Birds and the Bees when I was young so I know where babies come from and how they get there."
Melanie hesitated for a moment. "But, I'm leaving for college in a couple weeks and I need you to teach me about sex. Momma told me about how a boy puts his penis in a girl's vagina. I want to see."
Mike was embarrassed and unprepared for his daughter's request, but he didn't hesitate in answering. "Men spend their entire lives trying to put their penises in a woman's vagina.
"But Daddy, I've seen your penis lots of times and there is no way you can put that limp thing in my vagina."
Mike chuckled a bit and said, "It has to be hard first. When I grab my penis and slide my hand up and down its length it gets hard and erect. It's called masturbation. If I keep doing it after my penis is hard it will end with me climaxing and ejaculating sperm."
"I think I get an orgasm when I rub my clitoris." Melanie lifted her skirt and pulled her panties down revealing a thick blonde bush of pubic hair. Putting her fingers on her clitoris she said, "My vagina gets all wet when I rub it and I don't want to stop."
"Yes, a woman's clitoris is the center of a woman's sexual arousal just as the penis is the center of a man's sexual arousal."
"Show me how you make sperm come out of your penis," demanded Melanie.
"Ok." Mike unbuckled his jeans and let them fall to the floor along with his underwear. He saw the look on Melanie's face when she saw his stiff penis. "Men also get erections when they talk or think about sex. Even though you're my daughter you're also a beautiful woman and talking about sex with you has given me a boner. That's another name for an erection."
Mike put a little spit on his hand and started stroking his cock. "The wetness of a woman's vagina is a natural lubricant but my hand needs a little help," he said.
It was only a few moments before Mike climaxed. Melanie watched his cum shoot from the end of his penis, some of it landing on her panties. When he was finished cumming Melanie reached out and let the last bit of his cum run onto her fingers.
Holding her fingers up she said, "So, this is what makes babies."
"Yes, that and the eggs a woman has inside her."
Mike saw a perplexed look on Melanie's face. "I don't understand how a penis can fit in my vagina. I can barely fit one finger."